Debt - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2022	Dec. 31, 2021
Short-term Debt [Line Items]
Line of credit outstanding	$ 2,864,000,000	$ 1,791,000,000
Acquisition of Construction Equipment and Vehicles [Member]
Short-term Debt [Line Items]
Notes payable	2,000,000	1,000,000
2019 Term Loan [Member]
Short-term Debt [Line Items]
Line of credit outstanding	$ 1,127,000,000
Line of credit facility, interest rate	2.71%
Repayment of debt	$ 13,000,000
Remaining line of credit outstanding (unswapped portion)	$ 407,000,000
Line of credit facility, interest rate description	one-month LIBOR plus 250 basis points, but the rate will fluctuate as LIBOR fluctuates
2021 Term Loan [Member]
Short-term Debt [Line Items]
Line of credit facility, interest rate	2.96%
Repayment of debt	$ 15,000,000
4.125% Senior Notes [Member]
Short-term Debt [Line Items]
Line of credit outstanding	$ 350,000,000	350,000,000
Line of credit facility, interest rate	4.125%
Maturity date	Jul. 15, 2029
4.125% Senior Notes [Member] \| APi Group DE, Inc [Member]
Short-term Debt [Line Items]
Line of credit outstanding		$ 350,000,000
Line of credit facility, interest rate	4.125%	4.125%
4.750% Senior Notes [Member]
Short-term Debt [Line Items]
Line of credit outstanding	$ 300,000,000	$ 300,000,000
Line of credit facility, interest rate	4.75%
Maturity date	Oct. 15, 2029
4.750% Senior Notes [Member] \| APi Group DE, Inc [Member]
Short-term Debt [Line Items]
Line of credit outstanding		$ 300,000,000
Line of credit facility, interest rate	4.75%	4.75%
Term Loan Facility [Member] \| 2020 Term Loan [Member]
Short-term Debt [Line Items]
Repayment of debt		$ 250,000,000
Term Loan Facility [Member] \| 2019 Term Loan [Member]
Short-term Debt [Line Items]
Line of credit outstanding	$ 1,127,000,000	1,140,000,000
Maturity date	Oct. 01, 2026
Term Loan Facility [Member] \| 2019 Term Loan [Member] \| Interest Rate Swaps [Member]
Short-term Debt [Line Items]
Derivative, fixed interest rate	4.12%
Term Loan Facility [Member] \| 2019 Term Loan [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Interest Rate Swaps [Member]
Short-term Debt [Line Items]
Debt instrument term	5 years
Derivative notional amount	$ 720,000,000
Derivative, fixed interest rate	1.62%
Term Loan Facility [Member] \| 2021 Term Loan [Member]
Short-term Debt [Line Items]
Line of credit outstanding	$ 1,085,000,000
Maturity date	Jan. 03, 2028
Term Loan Facility [Member] \| 2021 Term Loan [Member] \| 2022 Incremental Amendment [Member]
Short-term Debt [Line Items]
Line of credit outstanding	$ 1,100,000,000
Maturity date	Jan. 03, 2028
Term Loan Facility [Member] \| 2021 Term Loan [Member] \| Base Rate [Member]
Short-term Debt [Line Items]
Debt, variable interest rate	1.75%
Term Loan Facility [Member] \| 2021 Term Loan [Member] \| Eurodollar [Member]
Short-term Debt [Line Items]
Debt, variable interest rate	2.75%
Term Loan Facility [Member] \| Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Line of credit outstanding	$ 0	0
Maturity date	Oct. 01, 2026
Debt instrument term	5 years
Secured term loan	$ 500,000,000
Line of credit net letters of credit outstanding	398,000,000	227,000,000
Letters of credit outstanding	$ 102,000,000	$ 73,000,000
Term Loan Facility [Member] \| Revolving Credit Facility [Member] \| 2022 Incremental Amendment [Member]
Short-term Debt [Line Items]
Extended maturity date	2026
Term Loan Facility [Member] \| Revolving Credit Facility [Member] \| Base Rate [Member]
Short-term Debt [Line Items]
Debt, variable interest rate	1.25%
Term Loan Facility [Member] \| Revolving Credit Facility [Member] \| Eurodollar [Member]
Short-term Debt [Line Items]
Debt, variable interest rate	2.25%
Term Loan Facility [Member] \| Revolving Credit Facility [Member] \| Maximum [Member] \| 2022 Incremental Amendment [Member]
Short-term Debt [Line Items]
Line of credit outstanding	$ 500,000,000
Term Loan Facility [Member] \| Revolving Credit Facility [Member] \| Minimum [Member] \| 2022 Incremental Amendment [Member]
Short-term Debt [Line Items]
Line of credit outstanding	$ 200,000,000

Extended maturity date.

No definition available.

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- Definition

Line of credit net of letters of credit outstanding.

+ References

No definition available.

+ Details

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- Definition

Unswapped portion of line of credit.

+ References

No definition available.

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

Date the credit facility terminates, in YYYY-MM-DD format.

+ References

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- Definition

Description of interest rate for borrowing under credit facility. Includes, but is not limited to, terms and method for determining interest rate.

+ References

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- Definition

The effective interest rate during the reporting period.

+ References

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- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

+ References

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- Definition

Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
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- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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